The present study explored the changes in monthly streamflow Hindukush–Karakoram–Himalaya (HKH) region within Pakistan using recently developed trend analysis method known as innovative polygon (IPTA). data of 34 gauging stations installed HKH was analyzed, and Pettitt test applied to check homogeneity time series. entire area divided into 13 sub-basins, then each sub-basin were IPTA method. hi...